CN104498735A - Method for extracting vanadium by using vanadium slag mixed alkali roasting - Google Patents

Method for extracting vanadium by using vanadium slag mixed alkali roasting Download PDF

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Publication number
CN104498735A
CN104498735A CN201410801086.8A CN201410801086A CN104498735A CN 104498735 A CN104498735 A CN 104498735A CN 201410801086 A CN201410801086 A CN 201410801086A CN 104498735 A CN104498735 A CN 104498735A
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China
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vanadium
roasting
alkali
mixes
vanadium slag
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CN201410801086.8A
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李兰杰
白瑞国
陈东辉
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Hebei Iron and Steel Co Ltd
Hebei Iron and Steel Group Co Ltd Chengde Branch
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Hebei Iron and Steel Group Co Ltd Chengde Branch
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention discloses a method for extracting vanadium by using vanadium slag mixed alkali roasting. The method comprises the following process steps: (1) uniformly mixing vanadium slag, Na2CO3 and NaOH mixed alkali, performing oxidizing roasting in a calcining kiln, thereby obtaining the roasted clinker; (2) leaching the roasted clinker by using water, controlling the pH value of the leaching solution to be 9-14, performing solid-liquid separation, thereby obtaining the leaching slag and the vanadium liquid. According to the method for extracting vanadium by virtue of mixed alkali roasting and water leaching, due to the absence of addition of sodium chloride and sodium sulfate salts, toxic and harmful gases are not produced; the mixed alkali roasting is adopted, and the immersion ratio of vanadium is higher than 95 percent; and moreover, the mixed alkali roasting temperature is reduced by 50-150 DEG C compared with pure alkali roasting, a sintering phenomenon is avoided in the roasting process, the energy consumption increased by ball-milling and roasting of the clinker at the later stage is eliminated, and the method is a clean and high-efficiency vanadium extraction method.

Description

A kind of vanadium slag mixes the method for alkali roasting vanadium extraction
Technical field
The invention belongs to vanadium field of chemical metallurgical technology, particularly relating to is a kind of method that vanadium slag mixes alkali roasting vanadium extraction.
Background technology
Vanadium slag there is at oxygen-containing gas a kind of vanadium enrichment material that blowing down produces by vanadium-bearing hot metal, and the vanadium slag produced by vanadium titano-magnetite in Iron And Steel Industry is the main raw material of vanadium extraction.Take vanadium titano-magnetite as raw material production iron, the enterprise of vanadium product all adopts traditional vanadium slag sodium roasting technique vanadium extraction from vanadium slag at present, climbing steel, hold steel as China, sea, South Africa Wilder, New Zealand Steel Ltd. etc. all adopt above-mentioned technique.The technique ultimate principle of sodium roasting is with Na 2cO 3for additive, by high temperature sodium roasting (750-850 DEG C), the vanadium of lower valency is converted into the sodium salt of water-soluble pentavalent vanadium, then to the direct water logging of sodium roasting product, obtains the leaching liquid containing vanadium, after add ammonium salt obtain ammonium poly-vanadate precipitation, after reducing roasting, obtain the oxide product of vanadium.Sodium roasting technique vanadium recovery is low, and single roasting vanadium recovery is about 70%, and after repeatedly roasting, the rate of recovery of vanadium is also only 85%; Maturing temperature high (750-850 DEG C), and need repeatedly roasting, energy consumption is higher; Harmful HCl, Cl can be produced in roasting process 2deng aggressive gas, contaminate environment.
Chinese patent CN101215005A proposes a kind of method of vanadium slag and sodium salt (sodium carbonate, sodium-chlor) or sylvite (salt of wormwood, Repone K) roasting, this patent is applicable to the low vanadium vanadium slag of high silicon, maturing temperature is 700 ~ 820 DEG C, multiple temperature sections roasting, by control temperature system and salt proportioning, can prevent furnace charge from sintering, make technique direct motion, also roasting soaking time is reduced, V in tailings 2o 5content can reach 0.5 ~ 1%; Chinese patent CN1884597A, CN86108218A etc. have carried out different improvement to the additive of sodium roasting technique and temperature schedule, and ultimate principle is all the additive (Na by using different ratio 2cO 3, NaCl, Na 2sO 4, Na 2sO 3deng) and the different index such as extraction yield, roasting time, furnace charge sintering of temperature schedule to vanadium improve, but above technique and traditional sodium roasting principle, operating process, service temperature are substantially identical, cannot avoid producing the problems such as toxic and harmful, vanadium recovery are low.
In sum, in prior art, in Leaching of Vanadium from Vanadium slag process, the general maturing temperature existed is high, and the vanadium transformation efficiency rate of recovery is low, has the problem such as poisonous gas and a large amount of acid ammonia nitrogen waste water discharges in vanadium removal process.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that vanadium slag mixes alkali roasting vanadium extraction, and the method maturing temperature is low, leaching yield is high, do not produce toxic and harmful.
For solving the problems of the technologies described above, the present invention takes following processing step: vanadium slag mixes with mixed alkali by (1), and then oxidizing roasting in calcining kiln obtains roasting grog;
(2) the roasting grog water described in leaches, and then solid-liquid separation obtains leached mud and vanadium liquid.
Mixed alkali in step of the present invention (1) is Na 2cO 3with the mixture of NaOH, mix be vanadium slag weight with addition of amount 5 ~ 20% of alkali.
Mixed alkali formula of the present invention is NaOH quality is 5 ~ 90% of mixed alkali total mass, and surplus is Na 2cO 3; Preferably, described mixed alkali formula is NaOH quality is 10 ~ 60% of mixed alkali total mass, and surplus is Na 2cO 3.
Maturing temperature in step of the present invention (1) is 500 ~ 800 DEG C, and roasting time is 2 ~ 5 hours; Preferably, the maturing temperature in described step (1) is 600 ~ 750 DEG C, and roasting time is 2 ~ 5 hours.
PH of leaching solution in step of the present invention (2) controls 9 ~ 14 preferably, and the pH of leaching solution in described step (2) preferably controls 11 ~ 13.
Oxygen volume content in step of the present invention (1) in calcining kiln is 5 ~ 15%.
Extraction temperature in step of the present invention (2) is 50 ~ 90 DEG C.
Principle of the present invention is: vanadium slag is at pure Na 2cO 3under additive condition during oxidizing roasting, the melting behaviors of silicates can be generated, be wrapped in vanadium mutually around, hinder Low Valent Vanadium and O 2diffusion, so pure Na 2cO 3the roasting vanadium extraction rate of recovery is low, and sintering process easily produces sintering phase.But vanadium slag is at Na 2cO 3under mixing alkali roasting condition with NaOH, silicate phase can be decomposed destruction by NaOH, adds Low Valent Vanadium and O 2contact, improve the transformation efficiency of vanadium; And maturing temperature comparatively soda roasting reduction by 50 ~ 150 DEG C under mixed alkali roasting condition, reduce the sintering degree in roasting kiln, also improve the transformation efficiency of vanadium.So what adopt mixed alkali roasting to substantially increase vanadium turns leaching rate, and vanadium turns leaching rate higher than 95%.
The beneficial effect adopting technique scheme to produce is: the present invention adopts the method for mixed alkali roasting-water logging vanadium extraction, owing to not having the interpolation of sodium-chlor, sodium sulfate salt, does not produce toxic and harmful; What adopt mixed alkali roasting to substantially increase vanadium turns leaching rate, and vanadium turns leaching rate higher than 95%; And mixed alkali maturing temperature comparatively soda roasting reduce by 50 ~ 150 DEG C, so do not produce sintering phenomenon in roasting process, eliminate the later stage energy consumption that increases of ball milling roasting grog again.So the method is the method for clean and effective vanadium extraction.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Shown in embodiment 1: Fig. 1, the processing step that this vanadium slag mixes the method for alkali roasting vanadium extraction is as described below:
(1) prepare burden: by the Na of 1kg vanadium slag and 50g 2cO 3, 50g NaOH stirring and evenly mixing, containing V in vanadium slag 2o 510wt%;
(2) roasting: compound enters in rotary kiln and is heated to 800 DEG C of reactions 2h, the O in rotary kiln 2volume content is 11%, obtains roasting grog;
(3) leach: leached in 80 DEG C of water by step (2) gained roasting grog, pH of leaching solution is 11; Then carry out filtering and obtain tailings in vanadium extraction and the dissolution fluid containing vanadium.
After testing, calculate, in the present embodiment, the leaching rate that turns of vanadium is 98%.
Embodiment 2: the processing step that this vanadium slag mixes the method for alkali roasting vanadium extraction is as described below:
(1) prepare burden: by the Na of 1kg vanadium slag and 20g 2cO 3, 180g NaOH stirring and evenly mixing, containing V in vanadium slag 2o 520wt%;
(2) roasting: compound enters in rotary kiln and is heated to 600 DEG C of reactions 3h, the O in rotary kiln 2volume content is 5%, obtains roasting grog;
(3) leach: leached in 90 DEG C of water by step (2) gained roasting grog, pH of leaching solution is 9; Then carry out filtering and obtain tailings in vanadium extraction and the dissolution fluid containing vanadium.
After testing, calculate, in the present embodiment, the leaching rate that turns of vanadium is 99%.
Embodiment 3: the processing step that this vanadium slag mixes the method for alkali roasting vanadium extraction is as described below:
(1) prepare burden: by the Na of 1kg vanadium slag and 20g 2cO 3, 30g NaOH stirring and evenly mixing, containing V in vanadium slag 2o 511wt%;
(2) roasting: compound enters in rotary kiln and is heated to 750 DEG C of reactions 4h, the O in rotary kiln 2volume content is 15%, obtains roasting grog;
(3) leach: leached in 60 DEG C of water by step (2) gained roasting grog, pH of leaching solution is 14; Then carry out filtering and obtain tailings in vanadium extraction and the dissolution fluid containing vanadium.
After testing, calculate, in the present embodiment, the leaching rate that turns of vanadium is 95%.
Embodiment 4: the processing step that this vanadium slag mixes the method for alkali roasting vanadium extraction is as described below:
(1) prepare burden: by the Na of 1kg vanadium slag and 100g 2cO 3, 40g NaOH stirring and evenly mixing, containing V in vanadium slag 2o 515wt%;
(2) roasting: compound enters in rotary kiln and is heated to 750 DEG C of reactions 2h, the O in rotary kiln 2volume content is 10%, obtains roasting grog;
(3) leach: leached in 70 DEG C of water by step (2) gained roasting grog, pH of leaching solution is 12; Then carry out filtering and obtain tailings in vanadium extraction and the dissolution fluid containing vanadium.
After testing, calculate, in the present embodiment, the leaching rate that turns of vanadium is 97%.
Embodiment 5: the processing step that this vanadium slag mixes the method for alkali roasting vanadium extraction is as described below:
(1) prepare burden: by the Na of 1kg vanadium slag and 60g 2cO 3, 50g NaOH stirring and evenly mixing, containing V in vanadium slag 2o 512wt%;
(2) roasting: compound enters in rotary kiln and is heated to 650 DEG C of reactions 5h, the O in rotary kiln 2volume content is 13%, obtains roasting grog;
(3) leach: leached in 70 DEG C of water by step (2) gained roasting grog, pH of leaching solution is 13; Then carry out filtering and obtain tailings in vanadium extraction and the dissolution fluid containing vanadium.
After testing, calculate, in the present embodiment, the leaching rate that turns of vanadium is 97%.
Embodiment 6: the processing step that this vanadium slag mixes the method for alkali roasting vanadium extraction is as described below:
(1) prepare burden: by the Na of 1kg vanadium slag and 144g 2cO 3, 16g NaOH stirring and evenly mixing, containing V in vanadium slag 2o 517wt%;
(2) roasting: compound enters in rotary kiln and is heated to 700 DEG C of reactions 5h, the O in rotary kiln 2volume content is 12%, obtains roasting grog;
(3) leach: leached in 50 DEG C of water by step (2) gained roasting grog, pH of leaching solution is 10; Then carry out filtering and obtain tailings in vanadium extraction and the dissolution fluid containing vanadium.
After testing, calculate, in the present embodiment, the leaching rate that turns of vanadium is 96%.

Claims (10)

1. vanadium slag mixes a method for alkali roasting vanadium extraction, it is characterized in that, the method adopts following processing step:
(1) vanadium slag is mixed with mixed alkali, then oxidizing roasting in calcining kiln, obtain roasting grog;
(2) the roasting grog water described in leaches, and then solid-liquid separation obtains leached mud and vanadium liquid.
2. a kind of vanadium slag according to claim 1 mixes the method for alkali roasting vanadium extraction, it is characterized in that: the mixed alkali in described step (1) is Na 2cO 3with the mixture of NaOH, mix be vanadium slag weight with addition of amount 5 ~ 20% of alkali.
3. a kind of vanadium slag according to claim 2 mixes the method for alkali roasting vanadium extraction, it is characterized in that: described mixed alkali formula is NaOH quality is 5 ~ 90% of mixed alkali total mass, and surplus is Na 2cO 3.
4. a kind of vanadium slag according to claim 3 mixes the method for alkali roasting vanadium extraction, it is characterized in that: described mixed alkali formula is NaOH quality is 10 ~ 60% of mixed alkali total mass, and surplus is Na 2cO 3.
5. a kind of vanadium slag according to claim 2 mixes the method for alkali roasting vanadium extraction, it is characterized in that: the maturing temperature in described step (1) is 500 ~ 800 DEG C, and roasting time is 2 ~ 5 hours.
6. a kind of vanadium slag according to claim 5 mixes the method for alkali roasting vanadium extraction, it is characterized in that: the maturing temperature in described step (1) is 600 ~ 750 DEG C, and roasting time is 2 ~ 5 hours.
7. a kind of vanadium slag according to claim 2 mixes the method for alkali roasting vanadium extraction, it is characterized in that: the pH of leaching solution in described step (2) controls 9 ~ 14.
8. a kind of vanadium slag according to claim 7 mixes the method for alkali roasting vanadium extraction, it is characterized in that: the pH of leaching solution in described step (2) preferably controls 11 ~ 13.
9. a kind of vanadium slag piece according to claim 1-8 any one mixes the method for alkali roasting vanadium extraction, it is characterized in that: the oxygen volume content in described step (1) in calcining kiln is 5 ~ 15%.
10. a kind of vanadium slag according to claim 1-8 any one mixes the method for alkali roasting vanadium extraction, it is characterized in that: the extraction temperature in described step (2) is 50 ~ 90 DEG C.
CN201410801086.8A 2014-12-22 2014-12-22 Method for extracting vanadium by using vanadium slag mixed alkali roasting Pending CN104498735A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104498736A (en) * 2014-12-23 2015-04-08 河北钢铁股份有限公司承德分公司 Method for improving vanadium yield in vanadium extraction process via sodium salt roasting of vanadium slag
CN105838892A (en) * 2016-04-06 2016-08-10 北京科技大学 Method for extracting titanium, iron, manganese, vanadium and chromium from vanadium slag of iron and steel plant
CN107058764A (en) * 2017-04-17 2017-08-18 攀钢集团研究院有限公司 A kind of method that vanadium is reclaimed from corundum slag
CN107663579A (en) * 2017-09-29 2018-02-06 中国科学院过程工程研究所 Method for handling the difficult mineral of race containing garnet
CN113774237A (en) * 2021-09-15 2021-12-10 中冶赛迪工程技术股份有限公司 Method for preparing vanadium-rich liquid by using vanadium-rich slag
CN115849891A (en) * 2022-11-25 2023-03-28 东北大学 V-shaped groove 2 O 5 /Na 2 CO 3 Diffusion couple and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN101418370A (en) * 2008-11-21 2009-04-29 长沙市岳麓区东新科技开发有限公司 Novel industrialization method for comprehensive utilization of vanadium ferrotitanium ore concentrate
CN101705377A (en) * 2009-11-24 2010-05-12 锦州金业化工冶金技术咨询有限公司 Method for extracting vanadium from stone coal by wet-process enrichment and pyrogenic-process conversion
CN103088207A (en) * 2013-01-02 2013-05-08 河北钢铁股份有限公司承德分公司 Efficient vanadium extraction method by performing alkali roasting on vanadium mineral

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418370A (en) * 2008-11-21 2009-04-29 长沙市岳麓区东新科技开发有限公司 Novel industrialization method for comprehensive utilization of vanadium ferrotitanium ore concentrate
CN101705377A (en) * 2009-11-24 2010-05-12 锦州金业化工冶金技术咨询有限公司 Method for extracting vanadium from stone coal by wet-process enrichment and pyrogenic-process conversion
CN103088207A (en) * 2013-01-02 2013-05-08 河北钢铁股份有限公司承德分公司 Efficient vanadium extraction method by performing alkali roasting on vanadium mineral

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104498736A (en) * 2014-12-23 2015-04-08 河北钢铁股份有限公司承德分公司 Method for improving vanadium yield in vanadium extraction process via sodium salt roasting of vanadium slag
CN104498736B (en) * 2014-12-23 2016-08-17 河北钢铁股份有限公司承德分公司 A kind of method improving vanadium slag sodium roasting vanadium-extracting technique vanadium yield
CN105838892A (en) * 2016-04-06 2016-08-10 北京科技大学 Method for extracting titanium, iron, manganese, vanadium and chromium from vanadium slag of iron and steel plant
CN107058764A (en) * 2017-04-17 2017-08-18 攀钢集团研究院有限公司 A kind of method that vanadium is reclaimed from corundum slag
CN107663579A (en) * 2017-09-29 2018-02-06 中国科学院过程工程研究所 Method for handling the difficult mineral of race containing garnet
CN113774237A (en) * 2021-09-15 2021-12-10 中冶赛迪工程技术股份有限公司 Method for preparing vanadium-rich liquid by using vanadium-rich slag
CN115849891A (en) * 2022-11-25 2023-03-28 东北大学 V-shaped groove 2 O 5 /Na 2 CO 3 Diffusion couple and preparation method thereof
CN115849891B (en) * 2022-11-25 2023-08-08 东北大学 V (V) 2 O 5 /Na 2 CO 3 Diffusion couple and preparation method thereof

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Application publication date: 20150408